How many keywords per link pyramid

Guys
Ive been using some link pyramid services and they've been working

I however wanted to know how may keywords should I go for per link pyramid

Lets say 3 tier
1st tier has 10 High PR web 2.0, 10 article and 10 social bookmarking submissions (Manual)
2nd tier (linking to tier 1) - 200 wikis and 50 bookmarking submissions
3rd tier - Scrapebox and GSA (for tier 1 and tier 2)

For a link pyramind like this - how many keywords should I use for my 1st tier (to money website)

Lets say I'm targeting 10 keywords in this 1 link pyramid

Should I use all 10 in this 1 pyramid
OR
Should I use 3 keywords per link pyramind and hav 3-4 such link pyramids

Cheers

I'd say one, but I'd also say it's essential the content created is relevant generally, not spun shit with the keyword dropped in.

I guess it depends on the competitiveness of the keywords. Try it and let us know the results. I am also working on something similar so will post results as well....

To make it look more meaning full, give links to 2nd tier from third tier with long tails( make sure content is in some way related to things you are trying to make money on)
For 2nd tier make sure you have more relevant content and distribute your links with 10 important keywords
and for the tier 1, i would suggest mix of web 2.0 and real or expired domains and links from these sites should go with one or two important keywords which you want to target

If exact match, aim for less than 1%. Focus on branding, you can even go without exact keywords.